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Abstract

We numerically study the characteristics of optical rogue waves in the femtosecond supercontinuum (SC) generation and use the CW triggering mechanism to control the SC generation. Detailed simulation results show for the first time that a weak CW trigger can manipulate the behaviors of optical rogue waves in the femtosecond SC regime. For the proposed CW triggering technique which requires only wavelength tuning and is a handy approach for the active control of SC, the resultant spectrum can be greatly broadened, and the noise properties of the SC can be significantly improved in terms of both of the coherence and intensity stability.

Figures (5)

Fig. 1 Comparisons between (a, b, c, d) untriggered SC and (e, f, g, h) CW triggered SC where the CW trigger is at 1130 nm. Spectra of (a) untriggered and (e) CW triggered SC where the individual spectrum from an ensemble of 1000 simulations is shown as the gray line (for clarity only 100 simulations are plotted) and the calculated average spectrum is shown as the black line; (b) and (f) expanded view of (a) and (e) above 1450 nm; The first-order temporal coherence of (c) untriggered and (g) CW triggered SC; Histogram of the peak power probability distribution of (d) untriggered and (h) CW triggered SC after a long-pass filter (>1430 nm) using 180 W bins.

Fig. 4 (a) Spectra and (b) coherence for CW triggers at different wavelengths where the specific CW wavelength at 1130 nm is plotted in black and the CW trigger wavelengths change every 20 nm in anomalous dispersion regime from 1030 nm to 1210 nm (from bottom to top); (c) Overall coherence and (d) overall SNR versus CW trigger wavelength where the specific CW wavelength at 1130 nm is marked by the cross symbol and specific view of CW triggers wavelengths from 1125 nm to 1135 nm (1 nm as interval) are shown in the inset.

Fig. 5 (a) Spectra and (b) coherence for CW triggers at different wavelengths where the specific CW wavelength at 943 nm is plotted in black and the CW trigger wavelengths change every 20 nm in anomalous dispersion regime from 830 nm to 1010 nm (from bottom to top); (c) Overall coherence and (d) overall SNR versus CW trigger wavelength where the specific CW wavelength at 943 nm is marked by the cross symbol and specific view of CW triggers wavelengths from 937 nm to 945 nm (1 nm as interval) are shown in the inset.